Lots of big earnings announcements today. DuPont (DD) beat expectations but offered cautious guidance, thanks to Europe (a theme that will follow through many earnings announcements). AT&T (T) also beat expectations. Lockheed Martin (LMT) beat expectations and raised FY guidance but offered cautious outlook thanks to looming spending cuts. Texas Instruments (TXN) beat estimates but offered very weak guidance. UPS (UPS) misses estimates and lowered guidance. Overall, a pretty good day, showing US corporations, by and large, are going better than expected. Apple (AAPL) announces after the bell.